Princess Anne is alive.
If you meant 'The Frog Princess' the author was E. D. Baker whose novel was made into the Disney film 'The Princess and the Frog' .
A homophone for "princess" is "princes." Both words sound the same but are spelled differently and have distinct meanings.
Princess Yukiko died in 1720.
Princess Hatsusebe died in 741.
Eutropia - princess - died in 350.
Princess Muneko died in 1189.
Princess Teishi died in 1094.
Princess Hwahyop died in 1752.
Princess Wencheng died in 680.
Princess Tarakanoff died in 1775.
Princess Inoe died in 775.